While playing, just press "~" to bring up the console, write "player->[command]" and press "Enter". [command] is one of the items listed below.
Example of usage: 'player->AddItem "Gold_100" 12345' will add 12345 of gold to player.
TMG - God Mode
TGM -God Mode (On Some Systems)
Help -List of All Debugging Commands
SetFlying 1 - Fly Mode
SetSuperJump 1 - Super Jumping Mode
SetWaterWalking 1 - Walk on Water Mode
SetWaterBreathing 1 - Breathe Under Water
SetLevel [level] - Sets Player Level to [level]
AddItem "Gold_100" [gold] - Adds Gold where [gold] = amount
SetFatigue [fatigue] - Sets Player Max Fatigue to [fatigue]
SetMagicka [magic] - Sets Player Max Magic to [magic]
SetHealth [health] - Sets Player Health to [health]